lindburg



April 1 2 1937-. J. LINDBURG mw msosAL APPARATUS ron wonxsaudnss Filed oct. 8;1923 zsheets-'sn'eetfz Patented Apr. 12, i927.

JGS-ETH LINDBURG, OF BROGKLYN, NEW' YORK,

assenon `so unnnnwoon TYPE- WRITER COMPANY, OF NEW' YORK, N. Y.. A VL!O'BJORAL'IIIION GF DELAWARE.

)TUNE-DISPOSAL .APPARATUS 'FOR WORKBlE-NCHES.

Application 'filed October .8, 1923.

This invention relates lto an apparatus in which typewriters, other machinesand parts may safely be cleansed with volatile, inflammable. liquids, such as alcohol or gasoline. It is constructed to comply with the rules of the lire departments in various localities, which, in some cases, require .the exhaustion of the .fumes with a .minimum Vquantity of .air per minute, and. in others, `require a minimum mean velocity of air Ithrough the apparatus. Novel means are disclosed for efficiently collecting, exhaust-ing and properly disposing `of fumes vcreated by the inflammable liquids lwithin the apparatus, taking into consideration the .natural properties of .the generated vaporsandother conditions arising during the cleansing operation.

rllhe improved collecting means includes a novel `shaped hood with a contracted upper portion havingan auxiliary inlet to `the exhaust at .the highest point inthe hood. The shape and construction of the `hood aresuch that the rising vapors are completely .and effectively withdrawn, .and dead-pockets where such vapors might accumulate are eliminated.

Another novel feature in the design of the hood is the construction ofthe front opening with a head-plate vformed from sthe rear enclosing side, extending down at the front of .the opening. It is well known that flowing` fluids tend to cling to the sides of the vessel 'through which they pass. This effect is especially marked in handling gases, vapors or fumes. The rising vapors cling to the sides of the hood near the edges of the front opening' and tend to escape from the hood. To overcome -this tendency, 'fthe headplate is made to extend down over ythe upper side ofthe .front opening, and has an arch shaped edge which forms the upper edge of the .front opening.

Another feature of the invention is the novel construction of the -exhaust passage from .the upper Aor auxiliary exhaust inlet to the main intake of the exhaust fan. rlhis improved feature, instead of having -the auX- iliary exhaust inlet connect by aseparate outside pipe to .the main intake of the exhaust fan, as is usually the case, consists in partitioning, vat the rear wall of the hood, a narrow portion of the interior .thereof to form a separate passage. The upper opening of the Apassage forms the upper or auxiliary inlet `and the lower opening connects Serial No. 67,430.

with the lower or mainexhaust opening and with the intake .of the exhaust fan.

An advantage of I'having a .double passage for communicating the 'fumes in ythe hood with the conduit 'formed between the rear wall of the hood and the partition therein, is that "fluids generating gas-es [of different specific gravity may be used, suoli, for example, as gasoline and alcohol. Gasoline fumes are heavier than air, and 'therefore will `tend to cling low over the work-top vof the bench and will be drawn .through `.the opening at the bottom -of the hood, while alcohol fumes, bei-ng .lighter V.than Iair, will rise tothe top of the hood .to be sucked into the opening .at .the iop.

Another feature of the invention .is to :provide a baffle-plate at the `lower edge of :the partition to shield the `low-er or main Yexhaust inlet, so that `no foreign matter, especially solid material, can accidentally vget into the exhaust fan where .impact rwith the rotating blades thereof might 4cause a spark or do other injury to the apparatus.

There is provided .an .electric light at the top of the `housing' or .hood ito illuminate the machin-e within the hood. Due -to the fact that this hood may be used asa workd'beneh upon which the typewriters maybe adj-usted previous to being cleaned, there vis provided novel means .for controlling .the .light and the motor simultaneously. To this end there is provided a. switch vthrough ywhich `the light may be turned on or off while Ithe motor is running, or .the 'motor may `be stopped while the light is on.

Another feature of .the .invention is Vthe simple, compact and convenient .arrangement of the electrical .and mechanical parts '-to form the improved .apparatus for the Apurposes disclosed.

Other .features and advantages will .hereinafter appear.

In the `accompanying drawings,

Figure l isa diagrammatic .front view of the apparatus.

Figure 2 is a diagrammatic side elevation of the saine.

Referring to the drawings, lthe .apparatus comprises a bench l() vhaving a dished ine-tallined .top 1l, over which is `fitted Ya metal hood l2. The hood 12'has .a suitable opening 13 on one of. the. upstanding sides which gives access .to the .top l1 of the bench .l0 on which the cleansing operation takes place.

The side ot the hood 12 having the opening 13 therein will be designated as the t'ront ot the apparat-us. The trout opening;y 13 is suitably bound by an arc-top stitlening riin 13a of circular cross-section. This construction gives the opening;A 123 a desirable smooth edge. It also allows means it'or connectiurY at the top edge ot' the opening' 13 the headplate 12] formed 'from the rear upstaudiney wall 12*l ot the hood 12. The head-plate l2" over the opening` 13 is necessary to prevent rising` vapors that cling` to the sides oit the hood, near the cdpges ot the opening;` 13, troni perineatingr outside et the hood` 12. r"Che rear upstanding wall 12u has its top portion sloping' forward so as to shape the hood to reduce the upper cross-sectional area and to eliminate the torination ot dead-pockets in which the rising` vapors would tend to accumulate. The upstanding wall 12LL ot the hood 12 has an inner partition 14, which, together with the side wall 12, forms an air space 15. iin upper or auxiliary inlet 1G to the air-space 15 is formed at the upper edge thereof. The lower end ot the partition let has a forwardly sloping` baille-plate 17. which is arranged to forni a lower or main inlet 19 with an upstanding inner wall 1S mounted on top 11. The suin total ot the areas et the upper inlet opening- 16 and the lower inlet opening 19 is made to be equivalent to the area of the tan inlet 2O ot the exhaust fan 21. The exhaust fan 21 may be oit' the conventional types used for this class ot work.

A tully-enclosed, acid-proot. electric motor 32 may be directly connected to drive the tan 21. The motor 32 and exhaust tan 2l are suitably supported on the bench 10, as on cross-beams 38.

The battle-plate 17 at the lower end ot partition 14 entends over to shield the lower inlet opening` 19, as shown in Figure 2, so that 'foreign matter cannot accidentaliy get into the tan 21 and cause a spark with the rcvolvingl blades thereo't or otherwise cause injury to the apparatus. The hood 12 has an extension-hopper or conduit 22 downwardly dependingr from its rear side, which leads into a box-like chamber The latter is connected by suitable ineans to the t'an inlet 20. The extensiondiopper 22 has a iront-extending bottoni portion designed to otlset the downward contraction ot the hopper 22, where it joins chamber 2B. lhe

` cross-sectional areas oit the inlet and outlet wall ot the building,1r (not shown) to the atmosphere, or may be otherwise safely disposed oi.

l? or assembling.;` and cleaning purposes, a hand-hole 27 may be provided in the back ol chamber' 23, which may have a suitable closure, as sliding door 28. Standard fittings and motor are used in the electrical installation. rlhe lightaud niotor may be controlled iadividuznly, but, for simplicity. conipactness and convenience, are preferably arranged as follows. rlllhe wires are enclosed in conduits designated as a whole as 25), and

are tastened to the bench 1() by suitablemeans, as by clamps 30. A branch-fitting' 3l in conduit 29 leads to the motor 32 through a conduit-pipe 33, and to the light located within the hood 12, through conduitpipe ylhe electrical supply connection is led to the apparatus troni a suitable source (not shown), through conduit-pipe 3"?. Snap-switch 36, tor controlling the light and the motor, is positioned at one side near the trout ot' the apparatus, within easy reach ot the operator. rthe switch i6 may preten ably be otI the conventional tour-way type, which, for example, will, on successive operation, tirst start the motor 32; second, turn on the light 34 while the motor 32 runs; third, turn oit' the motor with light 34 still burning; and, lastly, turn oli' the light let. This cycle may be repeated as Otten as required, or the successive controls may be connected to give any other suitable cycles desired. Conduit-system 29, switch 36, light, 34. and motor 32 are ot the standard vapor proot type, approved by the lire underwriters, and are readily obtainable iroin any dealer in electrical supplies.

lllhen usin;` gasolene tor cleansing, the vapors created, which are heavier than air, do not rise, but remain close to the place where cleaning is being done. Therefore, the lower or main inlet 1S) is arranged between the partition 14: and the rear wall 12, near the bottoni ot' the hood 12, in'nnediately above the worl -top 11 ot' the bench lO. By this arrangement, most ot the vapors may easily be drawn into chamber 23 and exhausted by the lian 21. The upper or auxiliary inlet 1o is arranged for the purpose ot catching such vapors that escape the lower inlet 19. The amount or' vapors to be taken care ot by the auxiliary inlet 16 will vary with the room tei'nperature and humidity oit the air, and with the amount of stirring up ot the air and vapors in the hood, in handling! the machine during; the cleansingv operation. `When using alcohol as a cleansiu fluid the amount ot vapors to be handled A bythe auxiliary inlet 16 is noticeably greater than when gasolene is used. The fumes created while cleansing.` in the improved apparatus. as herein disclosed, will be prevented from escaping` except through the en lll? haast provided, and can be safely disposed ot'. The surroundings in which the operator works will also be kept practically7 tree troni obnoxious vapors.

Variations may be resorted to within the scope ot the invention, and portions ot the improvements may be used without others.

Having thus described my invention7 l claim:

l. An apparatus i'or removing 'fumes from a work bench, some ot the fumes beinelighter and others heavier' than air, comprising a hood having' a trout and a rear wall, the rear wall extendin` upwardly from the bench then forwardly over the bench and curved downwardly7 to an opening' in the front ot the hood, the trout wall tern'iinating,` within `and near the top and bottom portions ot the rear wall with a space intermediate the. walls extending' across the top ot the hood, means communieating` with the bottom oi the hood for suckingl the tumes lighter than air over the top terminal ot the inner wall downwardly between the walls and the 'Huid heavier 'than air down under the lower terminal ot' the inner wall and through the sticking means and a conduit tor conducting the fumes away.

2. i safety apparat-us *for removing tunies from a work bench comprising a hood having an inner and a rear wall and end walls. the rear wall extending upwardlyT and toi'- wardly over the bench, then downwardly to an opening in the front ot' the hoodv` the inner wall extending from one end wall to the other ot' the hood and terminatingl near the top and bottom portions ot the rear wall with a space intermediate the inner and rear walls, a second inner wall in the hood e2;- tending above the lower terminal ot the iii-st mentioned inner wall, means tor sucking the fumes over the top terminal ot the upper inner wall and between the bottom o t said inner wall and the top ot the second inner wall and through the sucking means. and a conduit for discharging the 'luiues at a dis-- tance 'from the hood.

3. A safety apparatus 'for use in cleaning; typewriters and the like. comprising a shell dished on its upper surtace to collect cleaning tiuid and having a. hood extending` over the rear edge and ends ot the dished portion wit-h an opening at the` front side o't' the hood. said hood having` an outer and inner wall at its rear port-ion. the outer wall ez;- tending over the hood and down to the open ing in front ot the saine. the inner wall ot the hood terminating' within the outer wall and near its top portion. said inner wall also terminating' above the dished portion ol the shelf, a second inner 'all extending' upwardly over the ends ot said dished portion and overlapping the lower portion of the lirst mentioned inner wall with a space between the overlapping' inner walls and both paratus'to be cleaned is adapted to sit, a hood lor enclosing the apparatus to be cleaned having` an oaening in its 'liront wallA` said hood having' a conduit extending` trom its upper poriiom downwardly to its lower portion, and a branch conduit extending trom above the shelf to the lower portion ot the first mentioned conduit, a tan below the shelt coininunicating` with both conduits and with an outlet conduit whereby7 fumes may be drawn troni the upper portion ot the hood and trom the lower portion the-root above the shel't down through the tan and out through the conduit.

5. A cleaning apparatus comprising a bench having;` a work table tor supporting the apparatus to be cleaned and a tan beneath the work table, a hood comprising a rear wall extending from the tan upwardly over the apparatus and downwardly t-o an opening in the iront ot the hood, an inner va-ll spaced trom the rear wall extending 'from the top portion of the hood and terminating' above the table, a second inner wail extending upwardly from above the table and then downwardly and tern'iinatina' above the tan opening, there being a ,space between the rear wall ot the hood and both the inner' walls and between the inner walls, and a conduit leading from the 'tan where by turnos may be sucked by the tan from the top ot the hood and between the two inner walls downwardlyT through the ltan and discharged through the conduit,

(i. An apparatus .for use in cleansing type writers and the like, where volatile fluids are used, said apparatus comprising a suitable work table, a hood over said work table tor enclosing and confining 'fumes created during the cleaning operation, a duct having a lower opening' and inclined upwardly 'from the work top through which most ot the vapors are drawn from the hood, said duct being formed by a partition along the rear wall of the hood, another opening in said duct positioned at the top ot the hood for catching the vapors that may not enter the first mentioned opening'. means below the hood tor exhausting and dispos ingr ot' the fumes from both openings. and a baille plate at the lower end of the partition positioned over the lower' openingto guide against accidental passage into the errhausting means of foreign material that is liable to produce a spark in the exhausting IHCRDS.

7. A cleansing apparatus comprising an enclosure lor conlining fumes resulting from a cleansing operation, said apparatus including a power driven exhaust tan, the suction end in close comn'ninication w'th said enclosure for withdrawing the fumes from the enclosure, the communication loetween the tan and the enclosure comprising' a main passage with two branches, one branch extending` troni the upper portion ot the enclosure downwardly and the other from the lower portion of the enclosure first upwardly to prevent solid particles passing therethrough and thence join the other passage in a downward direction, the last inentioned passage merging into a closed chainber in iront of the fan, and an exhaust outlet from the fan to conduct the fumes to a distance from the enclosure.

8. A cleaning apparatus comprising a bench having a work table thereon, a hood for enclosing and confining the fumes created during the cleansing' process having an opening in the front upright wall of the hood to give access to the work table, a conduit at the rear otl the hood having a inain exhaust opening positioned close to the work topfsaid conduit extending first upwardly and then downwardly and through which inost of the vapors may be withdrawn, a partition along the rear wall of the hood forming a passage between the partition and the rear wall ot the hood, said passage extending over the upper portion ot the hood for catching' the vapors that rise and may not have entered the main lower inlet. a power' driven exhaust tan below the work top a chaniher at the entrance end ot the fan the rear wall ot' the hood extending down in front of said 'fan to torni one wall ot the chamber and ot the passage from the upper portion of the hood and an outlet for conducting the vapors to the outside atmosphere from the fan.

4 recano? 9. A cleaning apparatus comprising a bench having a .vorl-top thereon, a hood Yfor enclosing and conlining the fumes created during the cleansing process, having an openingl in the trent upright wall ot' the hood to give access to the work-top, a conduit at the rear ot the hood having a main exhaust inlet opening positioned close to the work-top through which inost ot' the vapors may be withdrawn, a partition along the rear wall of the hood forming a separated passage between the partition and the rear wall of the hood, an auxiliary inlet opening at the upper end ot the passage tor catching the vapors that may not enter the main inlet, a power-driven exhaust tan, a chamber connecting the conduit with the tan, suitable piping theretrom tor conducting the vapors to the outside atmosphere, and a bathe-plate at the lower end oi" the partition positioned over the main inlet opening to guard against accidental passage ot foreign material that is liable to cause damage and injury.

10. A bench having a work-top for cleaning typewriting machines and the like with volatile intlannnable liquids, a hood for conlining the iun'ies generated during` the cleansing process, having an opening in the front wall to give access to said work-top, a partition parallel to the rear wall of the hood and spaced therefrom forming a conduit for carrying the tuines entering through an openingat the top, a comparatively low upstanding wall separated from the rear wall forming al passage and co-operating with the lowermost end ot the partition to torni a second opening higher than the worlrtop through which the vapors are also drawn into said conduit` and means for exhausting and disposing of the fumes, said means comprising a suction-fan operatively connected to said conduit by means of pipes having the saine area as the combined areas of the two openings to eliminate l'rictional resistance within the conduit.

JOSEPH LINDB URG. 

